Home / 129,052.08-178,111.16-78,780.24

Finding the Fourth Proportional to 129,052.08, 178,111.16 and 78,780.24

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Solution

The fourth proportional to 129,052.08, 178,111.16 and 78,780.24 is: 108,728.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,052.08 : 178,111.16 = 78,780.24 : x
  2. Step 2: Convert to fraction form
    129,052.08/178,111.16 = 78,780.24/x
  3. Step 3: Cross multiply
    129,052.08x = 178,111.16 × 78,780.24
  4. Step 4: Simplify right side
    129,052.08x = 14,031,639,931.48
  5. Step 5: Solve for x
    x = 14,031,639,931.48/129,052.08
  6. Step 6: Final answer
    x = 108,728.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.